MAME 0.183 - Solid 20th Anniversary Release

Today brings us a special MAME release, and changes are many. The Mac binary compiles nicely as always from source and some performance tests indicate that this is rock stable. Also the Homebrew version of MAME made a jump to this version and is now up to date. All in all everything works as expected - and also does not work. Thus no news on the BGFX-METAL bug, but that was not to be expected anyways.